Capacity estimation system, capacity estimation method, and program

Abstract

A capacity estimation system includes an acquisition unit configured to acquire, for each of a plurality of vehicles, transition information which is information indicating a transition of a battery capacity of a secondary battery of the vehicle and usage history information which is information indicating a usage history of the secondary battery, a database generation unit configured to generate a database including the transition information and the usage history information for each of the plurality of vehicles, a selection unit configured to select at least transition information among transition information and usage history information of a vehicle which are similar to transition information and usage history information of a target vehicle among the plurality of vehicles, and an estimation unit configured to estimate a battery capacity of a secondary battery of the target vehicle on the basis of at least the transition information selected by the selection unit.

What is claimed is: 
     
         1 . A capacity estimation system comprising:
 an acquisition unit configured to acquire, for each of a plurality of vehicles, transition information which is information indicating a transition of a battery capacity of a secondary battery of the vehicle and usage history information which is information indicating a usage history of the secondary battery;   a database generation unit configured to generate a database including the transition information and the usage history information for each of the plurality of vehicles;   a selection unit configured to select at least transition information among transition information and usage history information of a vehicle which are similar to transition information and usage history information of a target vehicle among the plurality of vehicles; and   an estimation unit configured to estimate a battery capacity of a secondary battery of the target vehicle on the basis of the at least transition information selected by the selection unit.   
     
     
         2 . The capacity estimation system according to  claim 1 , wherein the acquisition unit, the database generation unit, and the selection unit are realized by a vehicle exterior device, and
 at least part of the estimation unit is realized by a device mounted in the target vehicle.   
     
     
         3 . The capacity estimation system according to  claim 2 , wherein the device mounted in the target vehicle is configured to transmit a request signal to the selection unit when a state in which an estimated value of the battery capacity of the secondary battery is not updated has continued over a reference or more, and
 the selection unit is configured to transmit data for estimation of the battery capacity of the secondary battery in response to the request signal from the target vehicle.   
     
     
         4 . The capacity estimation system according to  claim 1 , wherein the selection unit is configured to select at least transition information among transition information and usage history information of a vehicle in which a secondary battery whose elapsed usage time is longer than an elapsed usage time of the secondary battery of the target vehicle is mounted or a vehicle that has traveled a travel distance longer than a travel distance of the target vehicle. 
     
     
         5 . The capacity estimation system according to  claim 1 , wherein the usage history of the secondary battery is a history of at least one of a charge rate, a current value, a voltage value, and a temperature of the secondary battery. 
     
     
         6 . A capacity estimation method comprising:
 acquiring, by one or more computers, for each of a plurality of vehicles, transition information which is information indicating a transition of a battery capacity of a secondary battery of the vehicle and usage history information which is information indicating a usage history of the secondary battery;   generating, by the one or more computers, a database including the transition information and the usage history information for each of the plurality of vehicles;   selecting, by the one or more computers, at least transition information among transition information and usage history information of a vehicle which are similar to transition information and usage history information of a target vehicle among the plurality of vehicles; and   estimating, by the one or more computers, a battery capacity of a secondary battery of the target vehicle on the basis of the selected at least transition information.   
     
     
         7 . A computer readable non-transitory storage medium storing a program for causing one or more computers to execute:
 acquiring, for each of a plurality of vehicles, transition information which is information indicating a transition of a battery capacity of a secondary battery of the vehicle and usage history information which is information indicating a usage history of the secondary battery;   generating a database including the transition information and the usage history information for each of the plurality of vehicles;   selecting at least transition information among transition information and usage history information of a vehicle which are similar to transition information and usage history information of a target vehicle among the plurality of vehicles; and   estimating a battery capacity of a secondary battery of the target vehicle on the basis of the selected at least transition information.